In an Experiment,argon Is Allowed to Effuse Through a Tiny

question 3

Multiple Choice

In an experiment,argon is allowed to effuse through a tiny opening into an evacuated 5.00 × 10² mL flask for 30.0 seconds,at which point the pressure in the flask is found to be 15.0 mm Hg.The experiment is repeated using an unknown gas at the same temperature and pressure.After 30.0 seconds,the pressure is found to be 47.4 mm Hg.What is the molar mass of the gas?

• A) 4.00 g/mol
• B) 16.0 g/mol
• C) 28.0 g/mol
• D) 32.0 g/mol
• E) 83.8 g/mol

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Definitions:

Hypotenuse

The longest side of a right-angled triangle, opposite the right angle, calculated with the Pythagorean theorem.

Inches

A unit of length in the British imperial and United States customary systems of measurement, equal to 1/12 of a foot.

Hypotenuse

The longest side of a right-angled triangle, opposite the right angle, calculated as the square root of the sum of the squares of the other two sides.

Right Angle

An angle of 90 degrees.